1887
ASEG2009 - 20th Geophysical Conference
  • ISSN: 2202-0586
  • E-ISSN:
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Abstract

Introduction

The geology and petroleum potential of the western Tasmanian offshore basins is poorly understood. As part of a strategy to improve the understanding of these basins, aeromagnetic data was acquired by Geoscience Australia and Mineral Resources Tasmania under a National Geoscience Agreement and partly funded by the Commonwealth Government's Offshore Energy Security Program. The survey acquired 141,234 line km of high quality data with a line spacing of 800 m across the Bass, southern Otway and Sorell basins and Torquay Sub-basin (Figure 1). The aim of this survey was to acquire new aeromagnetic data to help delineate the structural architecture of the basins and underlying basement and the distribution of igneous rocks. The data fill a gap in the existing aeromagnetic coverage between Tasmania and mainland Australia and provide fresh insights into basement structure and its control on basin architecture and sedimentation patterns during the breakup of Gondwana and separation of Australia from Antarctica.

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/content/journals/10.1071/ASEG2009ab042
2009-12-01
2026-01-13
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References

  1. Bureau of Mineral Resources, Geology and Geophysics, 1965, Bass Strait and Encounter Bay Aeromagnetic Survey, 1960-1961 / by Haematite Explorations Proprietary Limited: Dept, of National Development, Canberra, A.C.T, Australia.
  2. Bernecker, T. and Moore, David H., 2003, Linking basement and basin fill: implications for hydrocarbon prospectivity in the Otway Basin Region: APPEA Journal, 42, 39-58.
  3. Birch, W.D. and VandenBerg, A.H.M., 2003, Continuing the advance of Victorian geology: In: Birch, W.D. (ed.) Geology of Victoria, pp. 1-13: Geol. Soc. Australia Special Publ. 23.
  4. Black, L.P., Seymour, D.B., Corbett, K.D., Cox, S.E., Strett, J.E., Bottril, R.S., Calver, C.R., Evarard, J.L., Green, G.R., McLenaghan, M.P., Pemberton, J., Taheri, J. and Turner, N.J., 1997, Dating Tasmania’s oldest events: Australian Geological Survey Record 1997/17.
  5. Cayley, R. A. and Taylor, D.H., 1998, The Lachlan margin Victoria: the Moyston Fault, a newly recognised terrane boundary: Geol Soc. Australia Abstracts 49, p. 73.
  6. Cayley, R.A., Taylor, D.H., VandenBerg, A.H.M. and Moore, D.H., 2002, Proterozoic - early Palaeozoic rocks and the tyennan orogeny in central Victoria: the Selwyn Block and its tectonic implications: Aust. J. Earth Sci., 49, 225-254.
  7. Direen, N.G. and Crawford, A.J., 2003, The Tasman Line: where is it, what is it, and is it Australia’s Rodinia breakup boundary? Aust. J. Earth Sci., 50, 491-502.
  8. Gibson, G.M. and Nihill, D.N., 1992, Glenelg River Complex: western margin of the Lachlan Fold Belt or extension of the Delamerian Orogen into western Victoria? Tectonophysics., 214, 69-91.
  9. Jacobsen, B.H., 1987, A case for upward continuation as a standard separation filter for potential-field maps: Geophysics, 52(8), 1138-1148.
  10. Miller, J.Mcl., Norvick, M.S. and Wilson, C.J.L., 2002, Basement controls on rifting and the associated formation of ocean transform faults - Cretaceous continental extension of the southern margin of Australia: Tectonophysics, 359, 131-155.
  11. Moore, D.H., VandenBerg, Willman, C.E. and Magart, A.P.M., 1998, Palaeozoic geology and resources, Victoria: AGSO J. Australian Geol. Geophys. 17, 107-122.
  12. Morand, V.J., Wohlt, K.E., Cayley, R.A., Taylor, D.H., Kemp, A.I.S., Simons, B.A. and Magart, A.P.M., 2003, Glenelg Special Map area Geological report: Geol. Survey Victoria report 123, Geol Surv. Victoria.
  13. Nabighian, M.N., 1972, The analytic signal of two-dimensional magnetic bodies with polygonal cross-section; its properties and use for automated anomaly interpretation: Geophysics, 37, 507-517.
  14. Nabighian, M.N., 1974, Additional comments on the analytic signal of two-dimensional magnetic bodies with polygonal cross-section: Geophysics, 39, 85-92.
  15. Norvick, M.S, and Smith, M. A., 2001, Mapping the plate tectonic reconstruction of southern and southeastern Australia and implications for petroleum systems: AAPEA J. 41, 15-35.
  16. Teasdale, J.P., Pryer, L.L., Stuart-Smith, P.G., Romine, K.K., Etheridge, M.A., Loutit, T.S. and Kyan, D.M., 2003, Structural framework and basin evolution of Australia's southern margin: APPEA Journal, 42, 13-37.
  17. Turner, S.P., Adams, C.J., Flottmann, T. and Foden, J.D., 1993, Geochemical and geochronological constraints on the Glenelg River Complex, western Victoria: Aust. J. Earth Sci, 40, 275-292.
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  • Article Type: Research Article
Keyword(s): Aeromagnetic; Basement; Basin Architecture; Structure.
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